YU Shuzhen, CHENG Yue, ZHANG Qiuxia

(School of Material Science and Engineering, Jingdezhen Ceramic Institute, Jingdezhen 333403, Jiangxi, China)

Abstract: The coated nanoscale zero-valent iron particles (K-Fe⁰, B-Fe⁰ and Z-Fe⁰) were synthesized by rheological phase reaction method, using kaolin, bentonite, and zeolite as coating agents. The samples were characterized by means of XRD and TEM. The effect of sample dosage, pH value and initial CHCl₃ concentration on the removal rate of CHCl₃, and the reaction mechanism of the coated nanoparticles were researched. Results show when the sample dosage was 1.5 g/L , the pH value was 5, and the initial CHCl₃ centration was 10 mg/L, the removal rates of chloroform in water by kaolin-Fe⁰, bentonite-Fe⁰, and zeolite-Fe⁰ were 73.1%, 70.9%, 74.4%, respectively.

Key words: rheological phase reaction method; mineral; coated nanoscale zero-valent iron; chloroform; removal rate